Comb-apron



Patented Julie 2,1891.

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H. BRAMM. 00MB APRON.

(No Model.)

UNiTEn STATES PATENT OFFICE.

HENRY BRAMM, OF JERSEY CITY, NElV JERSEY.

COMB-APRON.

SPECIFICATION forming part of Letters Patent No. 453,575, dated June 2, 1891.

Application filed February 3, 1891.

To @ZZ whom t may concern:

Be it known that I, HENRY BRAMM, a citizen of the United States, residing at Jersey City, in the county of Hudson and State of New Jersey, have invented certain new and useful Improvements in Comb-Aprons; and l do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the figures of reference marked thereon7 which form a part of this specification.

My invention relates to the manufacture of comb-aprons and belting.

The object of my improvements is to produce a comb apron for textile and other analogous machinery, which is cut from rawhide or leather stock without a joint. These endless jointless aprons may also be used for general belting purposes.

The invention consists in the following construction and method of manufacture, which will first be fully set forth and described in detail, and the features of novelty then set forth in t-he claims.

Figure 1 represents a disk of leather or rawhide stock cut from any suitable hide. Fig. 2 is a view of the forming-block. Fig. 3 represents the blocking-ring used in connection with the block. Eig. at is a vertical sectional View of the block and ring, illustrating a rawhide disk While being subjected to the action of the apparatus. Fig. 5 is a plan View of a machine provided with conical rollers for finishing the comb-aprons. Fig. 6 is a view of a completed comb-apron.

In the drawings, l represents a circular disk of rawhide or leather taken from suitable stock. This piece of hide l is placed centrally over the cylindrical block 2 and the ring or former 3 is brought down upon the hide 1, pressing it into the cup-shaped form 4C shown in Fig. The diameter of the cylindrical ring 3 is but slightly greater than that of the block 2 and a heavy pressure is required to force the ring down over the block. The stretching and forming of the disk l into the cup-piece 4 is very effective. A heavy screw-pressure is used for this purpose, but hydraulic or steam power may be employed.

Serial No. 379,970. (No model.)

The hide l from the center outward is subjected to an immense stretching and pushing action. Especially from the upper edge of the block 2 downward it is forced along the sides of the block and formed permanently into a cylindrical shape. The hideis left upon the block 2 sufficiently long` to become set, after which it is removed. The crown or cap piece 5 of the cup-shaped hide et is then cut out, leaving a jointless endless combapron or belt; but in this condition it will not run perfectly true and needs further manipulation.

G and 7 represent two conical rollers mounted in any suitable housing and drivenby any suitable power.

8 8 are screws for adjusting the distance of the rollers from each other. rlhe jointless endless comb-apron is mounted upon these rollers, as shown. The edge of the belt which was cut from next the crown-piece 5 is placed next the larger ends of the conical rollers for the purpose of giving that side of the apron a greater tension than the opposite side, whereby when the apron is taken off both sides of the apron will have an equal tension and a uniform diameter and circumference throughout the width of the belt-apron. During the rotation of the conical rollers the apron, following a well-known law or principle of belting, has a constant tendency to ride up the cone or toward the greater diameter, and the increased tension or stretching desired is proportionately effected at the points where such increased tension is required. latter operation is completed, the apron is taken from the rollers (and trimmed, if: necessary) and the apron is finished.

Different widths of comb-aprons and belts may be similarly made; or a wide apron may be formed and then cut into two or more narrower aprons, either before or aft-er they arc put upon the conical stretching-rollers.

Fig. 6 shows one of the completed combaprons. The final stretching is found neces sary to enable the belts to run perfectly true.

Instead of forming the comb-aprons from a solid disk or piece of hide, they may be made from a ring-shaped piece having the center cut out and its edges clamped to or otherwise secured to the block. The aprons when rst put. upon the rolls are subjected to a heavy Then this TOO stretching-tension thereon by the screws 8 before any rotary motion is given to the rolls. The center of the stock forming the combapron may be eut out before or after the apron is forced over the former.

What I claim, and desire to secure by Letters Patent, is-

1. The improvement in the art of making comb-aprons or belts, which consists in first taking a, substantially circular piece of hide or leather, then forcing it over a former to give it the shape of a cup with a closed end or crown-piece, and finally cutting out the crown-piece, thus forming an endless jointless band. or belt, substantially as set forth.

2. The method of making endless jointless comb-aprons or belts, which consists in foreing the stock over a former, cutting out the center, and stretching the apron lengthwise, substantially as set forth.

In testimony whereof I aflix my signature in presence of twol witnesses.

' HENRY BR AMM. lVitnesses:

CHAs. J. SCHLEGEL, CHAs. W. SEITZ. 

